Figure 37.
Typical startup procedure
2.6.1
Controlled startup procedure
The AC power supply is slowly increased to verify the procedure step-by-step as shown below.
Figure 38.
Connection and power-on procedure
Error/Fault
START
1. Turn Off (AC)
2. Turn Off (PS)
3. Disconnect Load
Y
Y
Y
Y
Y
N
N
N
N
N
Start
Plug
Control Board
Connect
12V & 7V Power Supply
(No Power)
Connect
Load cables
Connect
AC (A-B-C-N) cables
(No Power)
(No Power)
Check
“No Load” (E-Load disabled)
N
Y
Power On
12V & 7V Power Supply (PS)
BLED “WAIT”
START
N
HW Error
Y
Y
Achieved
Enable | Increase AC source
VACrms_plug?
(i.e.>10Vpk)
BLED “IDLE”
N
BLED “WAIT”
Error
N
Achieved
BLED “IDLE”
Y
Increase AC source
VACrms_min?
(i.e.>30Vpk)
N
Y
N
BLED “INIT”
Error
Y
N
BLED “INIT”
Y
Increase AC source
N
Vout >= VDCinrush
Y
BLED
“START”
N
Error
Y
RUN
BLED
“START”
N
Increase AC source
N
Vout >= VDCinrush
Y
Y
BLED “RUN”
N
Error
Y
N
N
This procedure takes the below grid relays (pink box) and the inrush relays (yellow box) into consideration.
UM2979
Startup procedure
UM2979
-
Rev 1
page 22/70
